Hot-melt polyurethane adhesive compositions

Details Hot-melt polyurethane adhesive compositions Hot-melt polyurethane adhesive compositions

1989-05-04

1991-03-12

Bleutge, John C.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Mixing of two or more solid polymers; mixing of solid...

525453, 525458, 528 60, 528 67, C08G 1810, C08G 1870

Patent

active

049994077

ABSTRACT:
Quick-setting hot-melt adhesive compositions comprising a mixture of at least two polyurethane prepolymer, each providing a different glass transition point to said composition. Preferably one prepolymer has a tg above room temperature and one prepolymer has a tg below room temperature. These adhesive mixtures show an attractive blend of properties, giving quick setting bonds which are flexible immediately after bonding and which after curing have excellent heat stability and resistance to hydrolytic and chemical attack.

REFERENCES:
patent: 3509232 (1970-04-01), Schollenberger
"Shaping Reactive Hot Melts Using LMW Copolyesters" paper by Adhesives Age, Authors Hans F. Huber and Hartmut Muller dated Nov. 1987.
Moisture Curing Hot Melts, a paper from "Hot Melt/TAPPI Symposium" by Dr. Hans Huber and Dr. Hartmut Muller.

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